Dad's shop sets about two blocks from the nearest three phase service going to the local VFD. He checked into getting a 3 phase service pulled in about 15 years ago. At the time he was told it would run in excess of $8000 to get the power to the shop, then there would be a 'demand' charge on top of the actual usage every month. Needless to say he spend the money to get a rotary converter that would handle everything on hand at the time and still leave a bit of room for more equipment if needed.
Your best bet to operate several pieces of three phase equipment is to simply buy, or build, a rotary converter and call it good.